<?php

// 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55

$a = 0;
$b = 1;

echo "$a $b ";

for ($i = 1; $i <= 10  ; $i++)
{
  $c = $a + $b;
  $a = $b;
  $b = $c;
  echo $c, " ";
}
